DJS IEC 
61770: 2019+ AMD1: 2019 
(IEC 61770:2008+AMD1:2015, IDT ) 
ICS 91. 140.60; 97.030 
DRAFT
 Jamaican Standard  
Speci
fication  
for 
Elect
ric appliances connected to the water mains – Avoidance of 
backsiphonage and failure of hose -sets 
BUREAU OF STANDARDS  JAMAICA
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019   
 
 
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019IMPORTANT NOTICE  
Jamai
can standards are subjected to periodic review. The next amendment will be sent without charge if you cut along 
the dotted line and return the self-addressed label. If we do not receive this label we have no record that you wish to be 
kept up-to -date. Our address: 
Bureau of St
andards Jamaica 
6 Winchester Road 
P.O. Box 113 
Kingston 10 
Jamaica W.I.  
--------------------------- (cut along the line)------------------------------------------------------------------------------------------ 
IEC 61770: 2019 + AMD 1: 2019 
NAME O
R DESIGNATION…………………………………….……………………………… 
ADDRES
S……………………………………………………….………….…………………… 
……………………………………….…………
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DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019JBS CERT
IFICATION MARK PROGRAMME  
The gener
al policies of the JBS Certification Mark Programme are as follows:  
- The JB
S provides certification services for manufacturers participating in the programme and
licensed  to use the gazetted JBS Certification Marks to indicate conformity with Jamaican
Standards.
- Where f
easible, programmes will be developed to meet special requirements of the submitter.
Where applicable, certification may form the basis for acceptance by inspection authorities
responsible for enforcement of regulations.
- In perf
orming its functions in accordance with its policies, JBS will not assume or undertake any
responsibility of the manufacturer or any other party.
Parti
cipants in the programme should note that in the event of failure to resolve an issue arising from 
interpretation of requirements, there is a formal appeal procedure.  
Further
 information concerning the details of the JBS Certification Mark Programme may be obtained 
from the Bureau of Standards, 6 Winchester Road, Kingston 10.  
CERTIFICATIO
N MARKS  
Product Certification Ma rks Plant Certification Mark  
              Certification of Agricultural Produce   Jamaica-Made Mark  
  (CAP) Mark  
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC 61770: 2019+AMD1: 2019 
ICS 91.140.60; 97.030 
Jamaican S tandard 
Spe
cification 
for 
Electric a pplianc es connected to t he water mains – Avoidance o f backsiphonage a nd failure o f 
hose-sets 
Bureau o f Standards J amaica 
6 Winchester R oad 
P
.O. B ox 113 
Ki
ngston 10 
Jamai
ca W. I. 
Tel: (876) 926-3 140-5 , (876) 618-1 534 or (8 76) 632-4 275 
Fax: (876) 929-4 736 
E-mail: i
nfo@bsj.org.jm
Websi
te: www.bs j.org.jm
Mont h  2019
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC  61770:  2019 + AMD1:  2019 
© 2019 Bure au of Standards Jamaica 
All rights reser ved. Unless otherwise specified , no part of a Bureau of Standards publication may be reproduced or 
utilized in an y for m or b y any means, electronic or me chanical, including, photocopying microfilm or scanni ng, 
without permission in writing. 
ISBN XXX-X XX-X XX-X XX-X 
Declared by the Bureau of Standards to be a standard specification  pursuant to section 7 of the Standards Act 1969. 
First published Month 2019 
This standard w as circula ted in draft form for comments under the reference DJS IEC 61770: 2019 +  AMD1: 2019. 
Jamaica n Standards establis h requirements i n relation to commodities, processes and practices, but do not purport to include 
all the necessary provisions of a contract . 
The attention of those using this s pecification  is cal led to the necessity of com plying with any releva nt legislation. 
Amendments 
No. Date of Issue Remarks Entered by and 
date 
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC 61770:  2019 + AMD1:  2019 
iii 
 Contents  
            
       Page  
 
Nationa l foreword                      v 
Acknowledgement                             vi 
 
   
CONTENTS  
1 Scope .......... .... ... .. ...... .. .............. .... .... ... ..... ..... .... ....... ....... .............. .. ............... ....... .... ..5 
2 Normati ve references .. .. ......... ...... .... ... ... ....... .. .............. ................ ........................ ....... .. .. .5 
3 Terms and definitions ................... ... ................. .......................... .... ....................... .................... 5  
4 General requirements ...... ... ............................... ................. .. ... ............. ............... ........ ….... .. 6 
5 General conditions for the tests .... ....... ........ ... .. ................... ..................................................... 7  
6 Airgaps ............................................ ............... ... .. .. .... .. ...... .......... ..... ................................ .... 8  
7 Pipe interrupters ................................. ..... .. ........ .......... .. ............... .... .... ................ .. ...... .. ..... 8  
8 Dynamic backflow preventers ....... .. ...... ....................... ....... .... ...... ... ................................ ...... 9  
9 Hose -sets ............................................... .. ....................... ............. ............................... ………. .. 10 
Annex A (normative) Backsiphonage test ... ..... ....... ........ ... .................... .......................... ........... 21  
Figure  1 - Arrangement for the determination of "h" for pipe interrupters ........... .. .... .. …... ......... 14  
Figure 2 - Arrangement for the determination of maximum and critical water levels for  
pipe interrupters .......... ......... ................. ............... .................... .... ........... .. ...... ...... ............ ...... 15  
Figure 3 - Kinking test .. .. .................... .. .... ............................ ......................... ...... ..... ….. ......... 16  
Figure 4 - Arrangement for verifying the resistance of hose -sets to pulses ........................ …….. ... 16 
Figure 5 - Mandrel for testing coupling nuts ................ ..... ..... ........................ .. ........... .. ........... .. 17 
Figure 6 - Mandrel for ozone test on hose -sets ...... ...... ..... ...... .. .... ...... .. .............................. ...... 17  
Figure 7 - Arrangement for the flexing test .................. .. ... ........ .. ................................................ 18  
Figure 8 - Arrangement f or the bending test ................................ ............ ...... .. .. ..................... ..... 19  
Figure 9 - Detail for applying the bending moment to coupling tubes .......................................... ... 19 
Figure 10 - Detail for the imp act test on coupling tubes ............................................................. ..... 20  
 
 Table 1 - Tests applicable to different types of hoses ...................... ... .......................................  .. . 10  
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC 61770:  2019 + AMD1:  2019 
iv 
  
   
 
       
 
      
 
      
 
    
  
        
  
 
 
  
NOTE  
 
Informative Annex  – gives additional information intended to assist in the understanding or use of the 
document. They do not contain requirements.  
 
Normative Annex  – gives provisions additional to those in the body of a document.  
They contain requirements.  
 
  
 
  
 
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC 61770:  2019 + AMD1:  2019 
v National foreword  
This st
andard is an adoption of and is identical to  the 2.0 edition IEC 61770: 2008 + AMD1: 2015 Electric appliances 
connected to the water mains – Avoidance of backsiphonage and failure of hose -sets  published by the International 
Electrotechnical Commission . 
S cope  
This International Standard specifies requirements for appli ances for household and similar purposes to prevent the 
backsiphonage of non-potable water into the water mains. It also specifies  requirements for hose -sets used for connecting 
such appliances to the water mains that supply water at a pressure not exceeding 1 M Pa.  
NOTE 
1 Examples of similar purposes are the installation of appliances in cant eens, restaurants, launderettes and communal 
flats.  
NOTE 2 This standard does not apply to appliances used for dry cleaning; 
- appliances for medical purposes;  
- appliances intended for industrial purposes;
- water heaters that are an integral part of the water supply system ;  
- water coolers that are an  integral part of the water supply system.
NOTE 3 T
he connection of the appliance to the water mains may be temporary or permanent. 
NOTE 4 When reference is made to the water mains, water supplied from a ci stern or similar system is also included. 
NOTE 5 Many countries have requirements concerning the prevention of cont amination of potable water as a result of 
contact with unsuitable materials upstream of a backflow prevention device. 
 Norm
ativ e references  
 The following referenced documents are indispensable for the application of this document. For dated references , only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) 
applies .  
IEC 60730-2-8, Aut
omatic electrical controls for household and s imilar use - Part 2: Particular requirements for electrically 
operated water valves, including mechanical requirements 
This standard is compulsory. 
Committee representation 
The revision of this standard for the Standards Council, established under the Standards Act, 1969 was carried out under the 
supervision of the Bureau's Electrical Practices and Products Technical Committee, which at the time comprised the 
following members:  
Mr R Cam pbell (Cha irperson) 
Mr C Brown (Vi
ce Chair) 
Mr. D B ennet t ( Technical S ecretary) 
Mr C Martin
Dr D Muir Ray Campbell Limited 
2A4 International Ltd. 
Independent 
Consumer Affairs Commission 
Caribbean Maritime Univeristy
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DJS IEC 61770:  2019 + AMD1:  2019 
vi M r E Foster  Sparky Licenced Electricians Connection  
Mr G Morgan Bureau of Standards Jamaica 
Prof H Morris University of the West Indies 
Mr J H Dunstan  IMAJ & J. H. Dunstan & Associates Ltd.  
Mr N Davids National Compliance and Regulatory Authority/ BSJ            
Mr R Chambers  CESCO Ltd  
M s S Lunan  Hardware and Lumber Ltd. 
M s T Smith National Compliance and Regulatory Authority/ BSJ            
M r W Smith Independent 
M rs S Satchell -Knight (Facilitator)  Bureau of Standards Jamaica 
Ms J Jackson (Recording Secretary)       Bureau of Standards Jamaica 
Acknow
ledgment 
Acknowledgement is made to the International Electrotechnical Commission  (IEC ) for permission to adopt IEC 61770: 
2008 + AMD1: 2015. 
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019Standards Council 
 
The Standards Council is the controlling body of the Bureau of Standards Jamaica and is responsible for the policy and general 
administration of the Bureau. 
 
The Council is appointed by the Minister in the manner provided for in the Standards Act, 1969.   Using its powers in the Standards 
Act, the Council appoints committees for specified purposes. 
 
The Standards Act, 1969 sets out the duties of the Council and the steps to be followed for the formulation of a standard. 
 
Preparation of standards documents 
 
The following is an outline of the procedure which must be followed in the preparation of documents: 
 
1. The preparation of standards documents is undertaken upon the Standard Council’s  authorisation.  This may arise out of 
representation from national organisations or existing Bureau of Standards ’ Committees or Bureau staff.  If the project is 
approved it is referred to the appropriate sectional committee or if none exists a new committee is formed, or the project is 
allotted to the Bureau ’s staff. 
 
2. If necessary, when the final draft of a standard is ready, the Council authorises an approach to the Minister in order to 
obtain the formal concurrence of any other Minister who may be responsible for any area which the standard may affect. 
 
3. The draft document is made available to the general public for comments. All interested parties, by means of a notice in the 
Press, are invited to comment. In addition, copies are forwarded to those known, interested in the subject. 
 
4. The Committee considers all the comments received and recommends a final document to the Standards Council 
 
5. The Standards Council recommends the document to the Minister for publication. 
 
6. The Minister approves the recommendation of the Standards Council. 
 
7. The declaration of the standard is gazetted and copies placed on sale. 
 
8. On the recommendation of the Standards Council the Minister may declare a standard compulsory. 
 
9. Amendments to and revisions of standards normally require the same procedure as is applied to the preparation of the  
                original standard. 
 
 
 
Overseas standards documents 
 
The Bureau of Standards Jamaica maintains a reference library which includes the standards of many overseas standards 
organisations.  These standards can be inspected upon request. 
 
The Bureau can supply on demand copies of standards produced by some national standards bodies and is the agency for the sale of 
standards produced by the International Organization for Standardization (ISO) members. 
 
Application to use the reference library and to purchase Jamaican and other standards documents should be addressed to: 
 
Bureau of Standards Jamaica 
6 Winchester Road 
P.O. Box 113, 
Kingston 10 
JAMAICA, W. I. 
 
 
 
DRAFT JAMAICAN STANDARD. COMMENTS PERIOD ENDING OCTOBER 2, 2019